Book/Report FZJ-2020-02247

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Superdeformation in GD-146: erste Beobachtung einer Bandenkreuzung



1990
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Spezielle Berichte / Forschungszentrum Jülich 566, 77 S. ()

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Report No.: Juel-Spez-0566

Abstract: High-spin states of the nucleus $^{146}$Gd were populated in a $^{110}$Pd ($^{40}$Ar, 4n)reaction. The emitted $\gamma$-radiation was measured using the OSIRIS-spectrometer.A superdeformed band consisting of 13 discrete transitions was found in $^{146}$Gd.From the data obtained in a second experiment, using a backed target, thelifetimes of the states in the SDB have been measured using the DSA-method.An average quadrupolmoment of Q$_{o}$=12± 2 eb could be deduced for the band.A band crossing occurs at rotational frequency of $\hbar \omega$ = 0.65 MeV. lt is for thefirst time that a crossing could be observed in a superdeformed band. Fromtheoretical calculations a $\pi$6$^{2}$ $\nu$7$^{i}$ configuration with odd spin an odd parity issuggested. The behaviour of the dynamic moment of inertia can be reproducedby cranked Nilsson-model calculations assuming a crossing of the [651 1/2]and [642 5/2] single-neutron levels.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000 ; Retrocat)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2020-06-09, last modified 2021-01-30